2026 Frikkin Lasers Challenge: Measuring Nanometer-Scale Displacements with an Optical Cavity
An individual built an optical cavity using 3D-printed components and a speaker to measure extremely small movements, demonstrating the sensitivity of laser interference. The setup used a webcam to monitor changes in light patterns, allowing for precise alignment and displacement detection. The experiment also revealed the wavelength instability of laser diodes during startup. This project highlights the potential of simple, accessible tools in advanced optical measurements.
An engineer built a device using 3D-printed parts and an optical cavity to measure tiny movements, down to the nanometer level, by observing changes in light patterns.
This innovation could improve precision in fields like engineering and physics, where detecting minute displacements is crucial for advanced measurements and experiments.
The project highlights creative problem-solving and accessible science, showing how everyday tools can be used to explore complex physical phenomena.
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